Document Type
Article
Publication Date
1-24-2014
Abstract
By combining the postulates of macrorealism with Bell locality, we derive a qualitatively different hybrid inequality that avoids two loopholes that commonly appear in Leggett-Garg and Bell inequalities. First, locally invasive measurements can be used, which avoids the “clumsiness” Leggett-Garg inequality loophole. Second, a single experimental ensemble with fixed analyzer settings is sampled, which avoids the “disjoint sampling” Bell inequality loophole. The derived hybrid inequality has the same form as the Clauser-Horne-Shimony-Holt Bell inequality; however, its quantum violation intriguingly requires weak measurements. A realistic explanation of an observed violation requires either the failure of Bell locality or a preparation conspiracy of finely tuned and nonlocally correlated noise. Modern superconducting and optical systems are poised to implement this test.
Recommended Citation
Dressel, J., Korotkov, A.N., 2014. Avoiding loopholes with hybrid Bell-Leggett-Garg inequalities. Physical Review A 89, 012125. doi:10.1103/PhysRevA.89.012125
Peer Reviewed
1
Copyright
American Physical Society
Comments
This article was originally published in Physical Review A, volume 89, in 2014. DOI: 10.1103/PhysRevA.89.012125